Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
su sach » so sach, vu sach
tinh va » tich va, trinh van, trinh vat
sach ky » sac ky, sach y, sach ty
tinh vi » trinh vi, tinh voi, dinh vi
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
cuu tre » cua tre, cau tren, cau treo
luc va » duc va, tuc va, loc va
va coc » va cuoc, va cac, va hoc

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ky nang xa hoi. hieu va coc luc va ((tinh vi) OR (tinh va)) ((cua viet) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang xa hoi. hieu va coc luc va ((tinh vi) OR (tinh va)) ((cua viet) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky nang xa hoi. hieu va coc luc va ((tinh vi) OR (tinh va)) ((cua viet) or (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: su sach ky nang xa hoi. hieu va coc luc va ((tinh vi) OR (tinh va)) ((cua viet) or (cuu tre))*.